Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Wow, first beam works! I used separated transformer 6,3V~. In original transformer there is some kind of short circuit to ground or something like that, because I measured resistance between 6,3V pins and ground and there is about 150ohm so it must be that. With second beam I will engage later...
Yes it is dual trace. Hmm, I will try to find some other transformer with 6,3~V, as you said maybe there is some broken insulation beetwen -1100V and 6,3~V transformer?! I will try to unconnect this 6,3V transformer and check what will blow up ;-). Yes inside crt lamp I can see orange glowing...
Hi there, sorry but I forgotten say that there is no any "main time base lines" on the screen, screen is blank.
Yes - squeking stop when I disconnected main cable of -1100v from pcb ( and also stop squeking when I disconnected this neon bulb from pcb) then voltages of power supply returns to...
Hi guys, I bought broken philips pm3231 scope (just for fun, and trying repair them with your help) I try to figure out what is wrong but I defeated with it, I have measured voltages with service & manual pdf and that I have found is : voltages in power supply are little low than should be, I...
I found it on this site https://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/100MHz_Scope_Probe.gif there is a lot of schematics but most without descriptions. Ok, so if I try to build it I try with your suggest, and maybe in the future I will find some description of it.
Hello everyone, simple question, I would like to build this scope probe but don't know value of L1 and L2, maybe does anyone know value of those L's, I try to find some description in net but didn't face on any description. Maybe someone know how value L1 and L2 should be. Thanks a lot for any...
Hello everyone, at first sorry for my language but i hope you will understand me. Because I'm quite dummy in electronic I was looking for some simple analog scrambler to build it and test it, but when I used google/image searcher I couldn't find no more than 3 simple schematics of scramblers...
hmm, I just covered hot iron with dark paper and again tested this meter and I had on display only about 120 - 150 C and paper almost combusted, next step I have done - I took fireclay brick and put it on gas kitchen and warmed it up quite a lot and indications of temp were strange,. ok...
Hello everyone, at first sorry for my english I'm not good in it,
1 I have question about Infrared thermometer
2 I bought cheap pyrometer and it is I think uncalibrated or broken
3 Because their indications of themperature are not good
4 When I measure for example : my skin there is about 26...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
